M_Boats: Advice for stained jib

I need some advice. My mail looks really good but the jib is stained. I didn't think nylon would stain so readily. If it will and the fabric is good, can I stain the fabric rather than purchase new sails? I don't think I can make it worse than it is. I would just like to defer the cost of a new set until maybe next year. Or is there something that will absolutely clean them to almost new color? I'm willing to try just about anything. Kendall M-15 #164 "Via Con Dios"